Water flows at 112°C through a steel pipe (k=90 W/m °C) whichhas a 6 cm inside diameter and 8cm outside diameter. Such that, hi=346 W/m2 °C and ho =6.0 W/m2 °C. Surrounding air temperature is20°C. To reduce heat loss to the surroundings the pipe is coveredwith an insulation insulation having the thickness of 4.0 mm andk=0,5W/m°C . Calculate;
a. Â Â The heat loss by convection per unit length fromthe bare pipe (before insulation).
b. Â Â The heat loss from the insulated pipe,
c. The critical radius. And discuss the result.
